# simplegeo/polymaps

Polymaps is a free JavaScript library for making dynamic, interactive maps in modern web browsers.

Repository: https://github.com/simplegeo/polymaps
Canonical: https://ross.abutalabs.com/products/polymaps
Homepage: http://polymaps.org/
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2023-07-26T06:25:28+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5893, "days_push": 1134, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license, no_readme
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1599, forks 210 (observed 2026-08-28T04:05:09.474164+00:00)

## What it is
Polymaps is a free JavaScript library for creating dynamic, interactive 'slippy' maps in modern web browsers using SVG. It extends the tile metaphor to vector graphics, supporting both image tiles (e.g., OpenStreetMap, Bing) and GeoJSON vector tiles rendered as SVG for rich, multi-scale data overlays.

## Use cases
- display interactive zoomable maps on a website
- visualize large GeoJSON datasets as map overlays
- render vector tiles with SVG and style them with CSS
- build multi-scale maps from country level down to street level
- overlay point clouds and county boundaries on image-based web maps

## When to choose
- you need SVG-based vector tile rendering with CSS styling
- you want on-demand loading and caching of large geospatial datasets
- you only need to support modern browsers with SVG support

## When to avoid
- you need broad legacy browser support (e.g., IE6)
- you want a library with active ongoing development and community support
- you need 3D maps or advanced features found in Leaflet or Mapbox GL

## Facets
- artifact type: library
- maturity: maintenance
- function: data-visualization, geospatial
- domain: data-visualization, web-development
- platform: browser
- tags: maps, svg, geo, slippy-map, tiled-maps, javascript

## Member repositories
- simplegeo/polymaps (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:09.474164+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:53:14.471163+00:00, confidence not recorded.
  - homepage: http://polymaps.org/ (fetched 2026-08-29T11:24:51.037968+00:00, sha fcdbe7fb8a17)
  - site_page: http://polymaps.org/docs (fetched 2026-08-29T11:24:51.040487+00:00, sha bce807e457fe)
- Data as of 2026-08-30T08:39:29.467469+00:00.